Using breakpoints

A breakpoint indicates a line of code or program at which you want the execution of an application to pause. When the application is paused, you can view and change the values of data items at that particular step. The Breakpoints Properties view shows details of all bound breakpoints and enables you to configure them.

You set breakpoints by:

• Double-clicking on the marker bar to the left of the requisite line of executable source code for a breakpoint.
• Right-clicking on the marker bar and choosing either Toggle Breakpoint from the context menu.
• You can create a breakpoint for any program in the workspace that your application uses by clicking Run > Add Program Breakpoint, or clicking the icon in the Breakpoint
• Using the Add an event breakpoint menu () on the Breakpoints tab. From it you can select the type of breakpoint to add: a program breakpoint, a PL/I condition breakpoint or a PL/I signal breakpoint. When you select Add Program Breakpoint, you are asked to enter the program name. When you select Add a PL/I Condition Breakpoint, a dialog opens that lets you select from a list of conditions to be notified of during the debug session. When you select Add a PL/I Signal Breakpoint, a dialog opens that lets you select from a list of signals to be notified of during the debug session.

The icon appears in the marker bar when a breakpoint is set. A tick mark is added to these icons when the breakpoint is bound to the program. A program breakpoint is indicated by the icon.